.header {
    height: 60px;
    width: 100%;
    display: flex;

    .left-logo {
        width: 240px;
        height: 60px;
        line-height: 60px;
        text-align: center;
        font-size: 18px;
        color: #000000;
    }
    .right-item {
        flex: 1;
    }
}